/*
* Handle ioctl() calls from userspace:
* Read or write the segments on single digits.
* Note extensive error checking of arguments
*/
static long vga_led_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
{
vga_led_arg_t vla;
switch (cmd) {
case VGA_LED_WRITE_DIGIT:
if (copy_from_user(&vla, (vga_led_arg_t *) arg,
sizeof(vga_led_arg_t)))
return -EACCES;
/*if (vla.digit > 8)*/
/*return -EINVAL;*/
write_digit(vla.digit, vla.segments);
break;
case VGA_LED_READ_DIGIT:
if (copy_from_user(&vla, (vga_led_arg_t *) arg,
sizeof(vga_led_arg_t)))
return -EACCES;
if (vla.digit > 15)
return -EINVAL;
int a;
a = ioread32(dev.virtbase + 4*vla.digit);
vla.segments = a;
// vla.segments = dev.segments[vla.digit];
if (copy_to_user((vga_led_arg_t *) arg, &vla,
sizeof(vga_led_arg_t)))
return -EACCES;
break;
default:
return -EINVAL;
}
return 0;
}
void write_number(int16_t number){
uint8_t h;
int16_t format_num = number;
//check if number is too big ot not
if ((number < 10000) && (number >= 0)){
//formats number based on digits to correct digits on display
for(h=0;h < num_digits;h++){
write_digit(format_num % 10, h);
format_num /= 10;
}
} else {
msg_error();
}
}
/*
* Handle ioctl() calls from userspace:
* Read or write the segments on single digits.
* Note extensive error checking of arguments
*/
static long vga_led_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
{
vga_led_arg_t vla;
circ_center cc;
switch (cmd) {
case VGA_LED_WRITE_DIGIT:
if (copy_from_user(&vla, (vga_led_arg_t *) arg,
sizeof(vga_led_arg_t)))
return -EACCES;
if (vla.digit > 8)
return -EINVAL;
write_digit(vla.digit, vla.segments);
break;
case VGA_LED_READ_DIGIT:
if (copy_from_user(&vla, (vga_led_arg_t *) arg,
sizeof(vga_led_arg_t)))
return -EACCES;
if (vla.digit > 8)
return -EINVAL;
vla.segments = dev.segments[vla.digit];
if (copy_to_user((vga_led_arg_t *) arg, &vla,
sizeof(vga_led_arg_t)))
return -EACCES;
break;
case VGA_LED_WRITE_CENTER:
if (copy_from_user(&cc, (circ_center *) arg, sizeof(circ_center)))
return -EACCES;
write_center(cc.cx, cc.cy);
break;
default:
return -EINVAL;
}
return 0;
}
void msg_error(void){
write_digit(10, 0);
}
